Yes, this is a Xamarin version problem. This error usually occurs when there is a mismatch of Xamarin NuGet packages between your sample and SfDataGrid assemblies. Our 14.2.0.28 version of release supports Xamarin NuGet of version 2.3.0.49. Xamarin recommends the NuGet packages to be inline in order to avoid potential issues. So please uninstall all the other version of NuGets and use 2.3.0.49 version in your sample. Clean and rebuild the project before running it.

Please uninstall all the Xamarin NuGet packages installed in your sample and then install 2.3.0.49 version Xamarin NuGet packages which is available in “Manage NuGet packages” option in properties section of your sample.